package com.foo.android2021;

import androidx.annotation.NonNull;
import org.jetbrains.annotations.Nullable;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatDelegate;
import androidx.appcompat.view.ActionMode;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.SharedElementCallback;
import androidx.core.app.TaskStackBuilder;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.ViewModelStore;
import androidx.loader.app.LoaderManager;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.Application;
import android.app.Dialog;
import android.app.DirectAction;
import android.app.PendingIntent;
import android.app.PictureInPictureParams;
import android.app.PictureInPictureUiState;
import android.app.VoiceInteractor;
import android.app.assist.AssistContent;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.ContextParams;
import android.content.Intent;
import android.content.IntentSender;
import android.content.LocusId;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.net.Uri;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.Looper;
import android.os.PersistableBundle;
import android.transition.Scene;
import android.transition.TransitionManager;
import android.util.AttributeSet;
import android.view.ContextMenu;
import android.view.DragAndDropPermissions;
import android.view.DragEvent;
import android.view.KeyEvent;
import android.view.KeyboardShortcutGroup;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.SearchEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;

import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.function.Consumer;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //R是一个内部类
        setContentView(R.layout.activity_main);

    }
}